ok - this is silly ... cup holders question

[ROBERTH]

What I use: https://www.amazon.com/dp/B01N9LTAZN?ref=ppx_yo2ov_dt_b_product_details&th=1
Also I slide one over the guide poles on the trailer so the poles don't mark up the sides of the boat when loading up.

 

[Fishtales]

Get the old foam style koozies. The holders were designed when this was the standard.